Synthesis of activated carbon using lemon peels: its photocatalytic and electrode material for high capacitance supercapacitor applications

IF 2.8 4区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Journal of Materials Science: Materials in Electronics Pub Date : 2025-03-06 DOI:10.1007/s10854-025-14479-7

B. V. Raghu Vamshi Krishna, Singampalli Rajasekhar, T. Nageswara Rao

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引用次数: 0

Abstract

The peels of lemon fruits were employed in the current work to produce activated carbon (AC-LP) using the high-temperature carbonization method. The fundamental properties of the AC-LP have been investigated using a number of representational techniques. The generated AC-LP powder was discovered to have a layered and porous form as revealed by scanning electron microscopic (SEM) images. The energy gap (E_g) of the activated carbon was found to be 2.23 eV. According to photocatalytic experiments conducted on fast blue (FB) dye, the AC-LP powder exhibits a 76.2% colour loss rate following 120 min of exposure to UV radiation. The AC-LP powder's electrochemical components were placed atop a nickel mesh that collected current. Nickel mesh electrodes were investigated using impedance spectroscopy and cyclic voltammetry. The AC-LP and AC-LP–rGO electrode's hydrogen diffusion coefficient was determined to be 9.867 × 10⁻⁶ and 3.234 × 10⁻⁴ cm² s⁻¹. The designed AC-LP–rGO electrode exhibited an exceptionally high capacitance potential as compared to the AC-LP electrode, as demonstrated by galvanostatic charge–discharge experimental results. A precise capacitance value of 201.5 F g⁻¹ and 274.27 F g⁻¹ were found for the AC-LP and AC-LP–rGO electrodes. One way to assess these effects is to examine how well different energy storage systems work with readily available carbon supplies. Possible future uses for these innovative findings include the creation of targeted resources for energy storage and environmental protection.

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用柠檬皮合成活性炭：用于高电容超级电容器的光催化和电极材料

以柠檬果皮为原料，采用高温炭化法制备活性炭（AC-LP）。AC-LP的基本性质已经使用一些表征技术进行了研究。通过扫描电子显微镜（SEM）图像，发现所制备的AC-LP粉末具有层状多孔结构。所得活性炭的能隙（Eg）为2.23 eV。在耐晒蓝（FB）染料上进行的光催化实验表明，在紫外线照射120分钟后，AC-LP粉末的显色率为76.2%。交流- lp粉末的电化学成分被放置在镍网上，镍网可以收集电流。采用阻抗谱和循环伏安法对镍网电极进行了研究。测定了AC-LP和AC-LP - rgo电极的氢扩散系数分别为9.867 × 10−6和3.234 × 10−4 cm2 s−1。恒流充放电实验结果表明，与AC-LP电极相比，所设计的AC-LP - rgo电极具有非常高的电容电位。AC-LP和AC-LP - rgo电极的精确电容值分别为201.5 F g−1和274.27 F g−1。评估这些影响的一种方法是检查不同的能源储存系统如何处理现成的碳供应。这些创新发现未来可能的用途包括为能源储存和环境保护创造有针对性的资源。

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来源期刊

Journal of Materials Science: Materials in Electronics 工程技术-材料科学：综合

CiteScore

5.00

自引率

7.10%

发文量

1931

审稿时长

2 months

期刊介绍： The Journal of Materials Science: Materials in Electronics is an established refereed companion to the Journal of Materials Science. It publishes papers on materials and their applications in modern electronics, covering the ground between fundamental science, such as semiconductor physics, and work concerned specifically with applications. It explores the growth and preparation of new materials, as well as their processing, fabrication, bonding and encapsulation, together with the reliability, failure analysis, quality assurance and characterization related to the whole range of applications in electronics. The Journal presents papers in newly developing fields such as low dimensional structures and devices, optoelectronics including III-V compounds, glasses and linear/non-linear crystal materials and lasers, high Tc superconductors, conducting polymers, thick film materials and new contact technologies, as well as the established electronics device and circuit materials.